Vivien Hsu, MD
NPI 1992875421 · Rheumatology Physician · New Brunswick, NJ
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivien Hsu, MD is a Rheumatology Physician provider in New Brunswick, NJ (NPI 1992875421).
Provider details
- NPI number
- 1992875421
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 25MA04721500 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
237 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 151 | $192 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 46 | $137 |
| Prolonged Office Or Other Outpatient Evaluation and Management Service(s) Beyond the Maximum Required Time of the Primary Procedure Which Has Been Selected Using Total Time on the Date of the Primary Service; Each Additional 15 Minutes By the Physician OrG2212 | 24 | $35 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 16 | $228 |
Typical Medicare-allowed amounts for these services range $35–$228 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 163 | 46 |
| Omeprazole | 121 | 39 |
| Prednisone | 110 | 34 |
| Nintedanib Esylatebrand: Ofev | 79 | — |
| Mycophenolate Mofetil | 65 | 22 |
| Tadalafil | 61 | 14 |
| Ambrisentan | 59 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,454 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-09
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Vivien Hsu's NPI number?
- Vivien Hsu's National Provider Identifier (NPI) is 1992875421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivien Hsu's specialty?
- Vivien Hsu is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Vivien Hsu located?
- Vivien Hsu's practice location on file with NPPES is 125 Paterson St, New Brunswick, NJ 08901-1962.
- What is Vivien Hsu's phone number?
- The practice phone number listed in the NPPES registry for Vivien Hsu is (732) 235-7217.
- Does Vivien Hsu accept Medicare?
- Vivien Hsu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivien Hsu's NPI active?
- Yes — Vivien Hsu's NPI (1992875421) is active in the NPPES registry as of the last update on 2024-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.